if you simply apply an overall tint, you’re affecting all the colors equally and they start merging into the same color. The background and foreground become hard to distinguish from each other and read as flat almost like b/w.
Now if you create mattes, you can tint highlights separately or reds, or saturate opposing color. I just gave a few templates so you could see other options available. I hope you have fun grading. It’s the candy part of the project.